Sewage Sludge Treatment by Hydrothermal Carbonization: Feasibility Study for Sustainable Nutrient Recovery and Fuel Production

Autor:	Krebs, Gabriel Gerner, Luca Meyer, Rahel Wanner, Thomas Keller, Rolf
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	hydrothermal carbonization phosphorus recovery digested sewage sludge hydrochar nutrient recovery climate-neutral fuel energy efficiency economic feasibility
Zdroj:	Energies; Volume 14; Issue 9; Pages: 2697
ISSN:	1996-1073
DOI:	10.3390/en14092697
Popis:	Phosphorus recovery from waste biomass is becoming increasingly important, given that phosphorus is an exhaustible non-renewable resource. For the recovery of plant nutrients and production of climate-neutral fuel from wet waste streams, hydrothermal carbonization (HTC) has been suggested as a promising technology. In this study, digested sewage sludge (DSS) was used as waste material for phosphorus and nitrogen recovery. HTC was conducted at 200 °C for 4 h, followed by phosphorus stripping (PS) or leaching (PL) at room temperature. The results showed that for PS and PL around 84% and 71% of phosphorus, as well as 53% and 54% of nitrogen, respectively, could be recovered in the liquid phase (process water and/or extract). Heavy metals were mainly transferred to the hydrochar and only
Databáze:	OpenAIRE
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